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mukulgoel's avatar
mukulgoel
Copper Contributor
Jul 23, 2025

Outlook Web Addin - Need to set Custom Properties in Compose Mode without using Task Pane

I am working on a feature in outlook web add-in where I need to set one custom property in Compose mode without using task pane this will mark and differentiate my email. Same value I will read in On...
outlook js
Outlook Web
Jaster's avatar
Jaster
Iron Contributor
Jul 24, 2025

You can set custom properties in compose mode through add-in manifest configuration plus the Office.js API.

  • mukulgoel's avatar
    mukulgoel
    Copper Contributor
    Jul 25, 2025

    I tried to set custom property, but it can only be set via having Task Pane open. Just based on Client-Side JS we can't set it up.

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